quadrant angle of fall

例句：

1. 1.The project's success depends on the accurate calculation of the quadrant angle of fall.
   该项目的成功取决于准确计算四分之一角的下降角度。
2. 2. The engineer used a special device to measure the quadrant angle of fall in the tunnel.
   工程师使用一种特殊的设备来测量隧道中四分之一角的下降角度。
3. 3. The team was able to determine the quadrant angle of fall by analyzing the data collected during the experiment.
   团队通过分析实验收集的数据，成功地确定了四分之一角的下降角度。